Description of problem:

Having connection issues with the CDN and see the JSON errors coming back in production foreman log but we are not using the data to inform user there are networking issues with CDN. I had previously cancelled a sync thinking it was hung. when trying to restart the sync the sync goes back to the "cancelled state" within 10 seconds. 

Looking at the production log: 

 Parameters: {"call_report"=>"[FILTERED]", "event_type"=>"repo.sync.finish", "payload"=>{"importer_id"=>"yum_importer", "exception"=>nil, "repo_id"=>"ACME_Corporation-Red_Hat_Enterprise_Linux_Server-Red_Hat_Enterprise_Linux_6_Server_RPMs_x86_64_6_5", "traceback"=>nil, "started"=>"2014-07-30T15:46:17-04:00", "_ns"=>"repo_sync_results", "completed"=>"2014-07-30T15:47:20-04:00", "importer_type_id"=>"yum_importer", "error_message"=>nil, "summary"=>{"content"=>{"state"=>"NOT_STARTED"}, "comps"=>{"state"=>"NOT_STARTED"}, "distribution"=>{"state"=>"NOT_STARTED"}, "errata"=>{"state"=>"NOT_STARTED"}, "metadata"=>{"state"=>"FAILED"}}, "added_count"=>0, "result"=>"failed", "updated_count"=>0, "details"=>{"content"=>{"size_total"=>0, "items_left"=>0, "items_total"=>0, "state"=>"NOT_STARTED", "size_left"=>0, "details"=>{"rpm_total"=>0, "rpm_done"=>0, "drpm_total"=>0, "drpm_done"=>0}, "error_details"=>[]}, "comps"=>{"state"=>"NOT_STARTED"}, "distribution"=>{"items_total"=>0, "state"=>"NOT_STARTED", "error_details"=>[], "items_left"=>0}, "errata"=>{"state"=>"NOT_STARTED"}, "metadata"=>{"state"=>"FAILED", "error"=>"HTTPSConnectionPool(host='cdn.redhat.com', port=443): Max retries exceeded with url: /content/dist/rhel/server/6/6.5/x86_64/os/repodata/repomd.xml (Caused by <class 'socket.error'>: [Errno 110] Connection timed out)"}}, "id"=>"53d94bc874702308fca8188c", "removed_count"=>0}, "token"=>"", "api_version"=>"v2", "repository"=>{}}

we can see the HTTPSConnectionPool error with cdn.redhat.com

propose to use the JSON error and craft a message to use to inform there are network/cdn issues.